glycemic variability
The fluctuation in blood glucose levels over time, measured through metrics that assess the amplitude and frequency of glucose excursions.
Full Definition
Glycemic variability refers to the oscillations in blood glucose concentrations that occur throughout the day and between days in individuals with diabetes. It encompasses both the magnitude and frequency of glucose fluctuations and is increasingly recognized as an independent risk factor for diabetic complications beyond average glucose control measured by HbA1c. High glycemic variability is associated with increased oxidative stress, endothelial dysfunction, and cardiovascular events. Common measures include coefficient of variation of glucose, mean amplitude of glycemic excursions (MAGE), and time in range. Continuous glucose monitoring has revolutionized the assessment of glycemic variability, allowing for more comprehensive evaluation of glucose patterns.
Usage
Usage note: Hyphenate when used as an adjective. Distinguish from simple glucose fluctuations.
In Context
- "Reducing glycemic variability may be as important as lowering average glucose levels for preventing complications." — Endocrinology journal article
- "The continuous glucose monitor revealed significant glycemic variability despite good HbA1c control." — Clinical case discussion